Does anyone know what is the max WHP obtainable from 440cc injectors and still be reliable/ not over worked??? also please post what dyno your numbers correspond to thanks.

 

417whp with my APS 440cc injectors @ 4BAR

No Meth

 

Is that with a FRS??

 

The basic fuel system the APS TT Kit came with

 

okay was that on a dynojet or dynodyamics.

secondly is it fast or do you feel as if it could be faster???

(Before anyone flames, the I HAVE DRIVEN A 400whp car before. Ive driven a 375whp rx7 and a 400whp mr2 turbo BUT both of those car WEIGHT ALOT less than a Z lol)

 

And put out less torque.

 

With a return system I'm around 415whp DJ at 80% IDC. You could probably get 500whp or so with a bump in fuel pressure, but honestly why risk it running at 100% idc....get the 600's if you're shooting for 450+. And don't even think about skipping a return system.

 

400whp is a realistic figure


laps

 

^^^ ditto that. plus 600's will leave you some room to grow if you build later and they cost about the same as the 440cc injectors

 

Also, keep in mind that the type of FI and the transmission also matters. I had 660cc injectors with a fuel return system and maxed my injectors at only 417whp on a Vortech and a 5AT tranny. The same fuel setup could have probably handled 100whp more on a turbo 6mt.

 

About 375whp safely without a return fuel system. with a return system about 425whp.

 

Did you have a return system? 417whp seems really low for maxing out 660cc's regardless of tranny type.

 

I'm pushing 437whp with just a Walboro 255 and 440cc. Dyno'ed on a Mustang Dyno.

 

Oopps...I meant 550 not 660. I have a fuel return.

 

it was maxxed out with my supercharger on 600cc DW with a full return system and dual pumps at 460 on the dyno dynamics.

superchargers use more gas than turbos...

 

with meth i hope to tap about 460whp on a mustang dyno

 

I made 368 on a dyno dynamics with 440 DW, but i dont think they were maxed out...

 

Here is a good tool for injector sizing.

http://www.stealth316.com/2-calc-idc.htm

 

When my TN kit was overboosting from the old pipes I was hitting 10-11psi with my 440's. It would start to lean out bad from them at that boost level, I would see 13-14Afr on the wideband. Tuner said the injectors cant flow enough fuel for that boost level.

The max I seen with my 440's was aroun 424hp.

 

427.61hp/344.60 lbs of torque with 440cc injectors and GTM stage 1 full return system @ 6.4psi